Finding the Fourth Proportional to 1,998.42, 2,758.18 and 1,253.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,998.42 : 2,758.18 = 1,253.02 : x
2. Step 2: Convert to fraction form
   1,998.42/2,758.18 = 1,253.02/x
3. Step 3: Cross multiply
   1,998.42x = 2,758.18 × 1,253.02
4. Step 4: Simplify right side
   1,998.42x = 3,456,041.54
5. Step 5: Solve for x
   x = 3,456,041.54/1,998.42
6. Step 6: Final answer
   x = 1,729.39